622-00000100 - Miller Smith 620 Series Silverline High Purity 2-Stage Regulator 100 PSI Panel Mount

Technical Overview of the Miller Smith 622 Silverline Regulator

The Miller Smith 622-00-00-01-00 is a premium component within the Silverline 620 Series, engineered specifically for high-purity gas applications where precision and contamination control are paramount. This two-stage regulator is constructed from nickel-plated brass bar stock, offering a robust housing that resists environmental corrosion while maintaining a high degree of internal cleanliness. The core of its performance lies in the unique stainless steel diaphragm. Unlike elastomeric diaphragms that can off-gas or degrade over time, the stainless steel construction ensures zero contamination of the gas stream, making it suitable for analytical instrumentation and specialty gas delivery systems.

Designed for panel mounting, this unit features 1/4" FNPT inlet and outlet connections, allowing for seamless integration into gas management manifolds or custom laboratory setups. The regulator operates with a maximum inlet pressure of 3500 PSI and provides a precise delivery range of 0-100 PSI. The two-stage reduction mechanism is critical for applications requiring unwavering outlet pressure; as the supply cylinder drains and inlet pressure decays, the 622 maintains a constant delivery pressure without the need for manual adjustment. This stability is essential for sensitive downstream equipment such as gas chromatographs.

Safety and integrity are built into the design. The regulator features a metal-to-metal seal between the body and the diaphragm, eliminating the need for gaskets that could introduce impurities. A filtered seat adds another layer of protection, trapping particulates before they can damage the sealing surface or enter the process stream. Furthermore, the bonnet includes a capturable vent (1/16" FNPT), allowing operators to pipe vented gases away to a safe location—a critical feature when handling hazardous or asphyxiating gases. The unit is also capable of withstanding internal vacuums, facilitating effective purging operations during cylinder changeovers.